CN214861156U - Double 8-shaped track carbon-free trolley - Google Patents

Abstract

The utility model discloses a double 8-shaped track carbon-free trolley, rear wheels (1) are arranged at two sides of one end of a bottom plate (10), a guide front wheel (2) is sleeved on the bottom plate (10) and is rotationally connected with the bottom plate, and a sliding block (14) is arranged at the sleeved end; the rope wheel shaft (4) is erected on the bottom plate (10) and drives the rear wheel (1) to rotate, one end of a rope (5) is wound on the rope wheel shaft (4), the other end of the rope (5) is connected with the heavy object block (7) by bypassing the support (8), the cam (17) is sleeved on the rope wheel shaft (4), the thrust rod (12) is connected with the cam (17) through the reset piece (22), and the other end of the thrust rod penetrates into the sliding block (14). The rear wheel (1) is driven to rotate by the gravitational potential energy of the heavy object block (7), and the cam (17) controls the thrust rod (12) to move so as to lead the front wheel (2) to do arc motion, thereby realizing double 8-shaped track motion of the trolley. The problem of current carbon-free trolley structure complicated, control difficulty can not realize the dolly orbit fine setting is solved.

Description

Double 8-shaped track carbon-free trolley

Technical Field

The utility model discloses a two 8 characters orbit carbon-free dollies belongs to contest equipment technical field.

Background

The carbon-free trolley is a three-wheel trolley which takes Joule gravitational potential energy as unique energy and has a continuous obstacle avoidance function, and the carbon-free trolley is really carbon-free. The trolley adopts a swing rod mechanism, the traditional rigid rod is changed into a flexible rope, the turning of the trolley is controlled more easily, the period of avoiding obstacles is easier to realize and control, and the weight of the whole trolley is reduced. At present, a carbon-free trolley is a landmark project for student engineering training competition in the mechanical engineering major in China, and is required to detour around 3 barrier piles with a distance of 350mm on a half standard table tennis table (1525 mm in length and 1370mm in width) along a double-8-shaped track, and the carbon-free trolley cannot hit a barrier and fall off the table tennis table during detour. The obstacles are 3 round rods with the diameter of 20mm and the length of 200mm, and are placed on the center line of the half table tennis table at a certain distance, so that the trolley can complete double 8-shaped track running.

The existing Chinese patent CN204684662U discloses a carbon-free trolley steering device with an 8-shaped walking track, which is difficult to process by adopting a cylindrical cam, has high cost, makes the whole steering mechanism complicated in structure and difficult to control, and cannot realize fine adjustment of the trolley track.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that current carbonless dolly structure is complicated, and the control difficulty can not realize dolly orbit fine setting.

The utility model provides a technical scheme that its technical problem adopted is: the double-8-shaped track carbon-free trolley comprises a bottom plate, two rear wheels, two guide front wheels, a support, two rope wheel shafts, a rope, a thrust rod, a cam, a reset piece and a heavy object block, wherein the two rear wheels are arranged on two sides of one end part of the bottom plate and are rotatably connected with the bottom plate; the rope wheel shaft is erected on the bottom plate, the rope wheel shaft is rotated to drive the rear wheel on one side to rotate, the support is vertically arranged on the bottom plate, one end of the rope is wound on the rope wheel shaft, the other end of the rope is connected with the heavy object block after bypassing the upper end of the support, the cam is sleeved on the rope wheel shaft, the thrust rod enables one end of the thrust rod to be in contact connection with the outer side wall of the cam through the reset piece, and the other end of the thrust rod penetrates into the strip-shaped hole of the sliding block.

Wherein, in the device, the middle part of the rope wheel shaft is of a conical structure, and the end part of the rope is wound on the conical structure.

Wherein, in the device, the reset piece is a rubber band or a spring.

The device also comprises a deflector rod, the deflector rod is perpendicular to the bottom plate, the upper end of the deflector rod is connected with the thrust rod, and the lower end of the deflector rod is inserted into the strip-shaped hole of the sliding block.

Wherein, still including adjusting frame and adjusting screw among the above-mentioned device, be provided with the bar hole on adjusting frame lateral wall and thrust rod end connection and the adjusting frame, all be provided with the screw hole on the both ends lateral wall in bar hole and the driving lever, the driving lever card is gone into the bar hole on the adjusting frame, and adjusting screw's one end penetrates from the screw hole of bar hole one end to wear out from the opposite side in bar hole after passing the driving lever again.

The device also comprises a guide post, the guide post is vertically arranged on the bottom plate, a through hole is formed in the upper portion of the guide post, and the thrust rod is sleeved on the guide post in a penetrating mode.

Wherein, one end of the rope wheel shaft in the device is provided with a driving gear, a driven gear is arranged on a rear wheel rotating shaft at one side of the bottom plate, and the driving gear is meshed with the driven gear.

The support in the device is of a T-shaped structure, the small end of the support is vertically connected with the bottom plate, the large end of the support is provided with a pulley, and the rope is connected with the weight block after bypassing the pulley.

The device also comprises a limiting frame which is of a tubular structure and is vertically arranged on the bottom plate, and the heavy object block is arranged in the limiting frame.

The device comprises at least two thrust rods, push rods are connected to the ends, close to the cam, of the adjacent thrust rods, and at least one push rod is in contact connection with the outer wall of the cam through a reset piece.

The utility model has the advantages that: the device adopts a three-wheel structure, wherein one wheel is a steering wheel, the other two wheels adopt single-wheel drive due to complex steering, one wheel is a free wheel, the other wheel is a driving wheel, the single-wheel drive has the periodic problem, and the steering of the trolley is solved by adopting a cam mechanism. The back wheel is driven to rotate by converting gravitational potential energy of the heavy mass into kinetic energy, and the guide front wheel is made to do arc motion by controlling the thrust rod to move back and forth through the cam so as to realize double-8-shaped track motion of the whole device. The structure arrangement ensures that the device has simple structure, convenient processing and lower cost. The device limits the heavy object block in the device through the limiting frame, so that the heavy object block can only move in the vertical direction, and the phenomenon that the moving track of the trolley is influenced or even the trolley is tipped because the heavy object block swings due to the walking of the trolley when falling is avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged schematic view of the structure at the point I in FIG. 1 according to the present invention;

fig. 3 is a schematic structural view of another view angle of the present invention;

FIG. 4 is a schematic front view of the structure of FIG. 1 according to the present invention;

fig. 5 is a schematic structural view of the utility model shown in fig. 4 with one side of the rear wheel removed.

Labeled as: the device comprises a rear wheel 1, a front guide wheel 2, a driving gear 3, a rope wheel shaft 4, a rope 5, a limiting frame 6, a heavy object 7, a support 8, a pulley 9, a bottom plate 10, a guide post 11, a thrust rod 12, a deflector rod 13, a slider 14, an adjusting frame 15, a positioning block 16, a cam 17, a driven gear 18, an adjusting screw rod 19, a push rod 20, an installation part 21 and a reset part 22.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 to 5, the double-8-track carbon-free trolley of the present invention comprises a bottom plate 10, a rear wheel 1, a guiding front wheel 2, a bracket 8, a rope wheel shaft 4, a rope 5, a thrust rod 12, a cam 17, a reset piece 22 and a heavy piece 7, wherein the two rear wheels 1 are arranged on two sides of one end of the bottom plate 10 and rotatably connected with the bottom plate 10, an installation part 21 of the guiding front wheel 2 vertically penetrates and is sleeved on the other end of the bottom plate 10 and rotatably connected with the bottom plate 10, and the end surface of the installation part 21 passing through the bottom plate 10 is provided with a slider 14 with a strip-shaped hole; the rope wheel shaft 4 is erected on the bottom plate 10, the rope wheel shaft 4 is rotated to drive the rear wheel 1 on one side to rotate, the support 8 is vertically arranged on the bottom plate 10, one end of the rope 5 is wound on the rope wheel shaft 4, the other end of the rope bypasses the upper end of the support 8 and then is connected with the heavy object block 7, the cam 17 is sleeved on the rope wheel shaft 4, the thrust rod 12 enables one end of the thrust rod to be in contact connection with the outer side wall of the cam 17 through the reset piece 22, and the other end of the thrust rod penetrates into the strip-shaped hole of the sliding block 14. As can be understood by those skilled in the art, the preferred trolley of the device adopts a three-wheel structure, one wheel is a steering forward wheel, the other two wheels adopt single-wheel drive due to complex steering, one rear wheel 1 is used as a free wheel, one rear wheel 1 is used as a driving wheel, the two rear wheels 1 are specifically arranged at two sides of one end part of the bottom plate 10 and are rotatably connected with the bottom plate 10, and the rear wheels 1 can be rotatably connected with the bottom plate 10 through the combination of a rotating shaft and a bearing seat. The installation part 21 of the front guide wheel 2 vertically penetrates and is sleeved on the other end of the bottom plate 10 and is rotatably connected with the bottom plate 10, the front guide wheel 2 is of a universal wheel structure after being connected with the bottom plate 10, the installation part 21 penetrates through the sliding block 14 with the strip-shaped hole on the end face of the bottom plate 10, the steering of the front guide wheel 2 can be realized by rotating the sliding block 14, in order to facilitate the installation of the front guide wheel 2, a positioning block 16 can be preferably arranged at the end part far away from the rear wheel 1, a through hole is formed in the positioning block 16, and the rod-shaped installation part 21 of the front guide wheel 2 penetrates into the positioning block 16 to realize axial positioning through a bearing. Erect rope pulley axle 4 on bottom plate 10, it can actually be fixed through the bar bearing frame, it is connected to keep rope pulley axle 4 and bottom plate 10 to rotate, because the orbit of dolly is two 8 word orbits also be sinusoidal, so the distance that two rear wheels 1 one cycle was gone varies, so need adopt single wheel drive, it is rotatory to rotate rope pulley axle 4 and can drive one side rear wheel 1, with support 8 vertical setting on bottom plate 10, twine the one end of rope 5 on rope pulley axle 4 simultaneously, the other end is walked around support 8 upper end and is connected with heavy object piece 7 again, cam 17 cover is established on rope pulley axle 4, make cam 17 and rope pulley axle 4 synchronous rotation. Through the arrangement, the rear wheel 1 is driven to rotate by converting gravitational potential energy of the weight block 7 into kinetic energy, and the double 8-shaped track motion of the whole device is realized by controlling the thrust rod 12 to move forwards and backwards through the cam 7 so as to lead the front wheel 2 to do arc motion. The thrust rod 12 has one end connected to the outer side wall of the cam 17 by a restoring member 22 and the other end inserted into a bar-shaped hole of the slider 14. In order to reduce the weight of the bottom plate 10, the bottom plate is preferably provided with lightening holes 101, that is, the bottom plate 10 is made into a hollow structure.

Preferably, the middle part of the rope wheel shaft 4 in the device is a conical structure, and the end part of the rope 5 is wound on the conical structure. It will be understood by the person skilled in the art that the device is preferably designed with a cone in the middle of the rope pulley shaft 4, while the ends of the rope 5 are wound around the cone. During actual winding, the rope wheel shaft 4 is wound along the small end to the large end of the conical structure in the middle, the structure and the winding mode enable the rotating radius to be large at the beginning, the starting torque to be large, starting is facilitated, and a fine adjusting device is added to adjust the torque. After starting, the rotation radius is reduced, the rotation speed is increased, the torque is reduced, and the trolley moves at a constant speed after the resistance is balanced. When the weight block 7 is close to the bottom plate 10, the rotation radius is reduced again, the pulling force of the rope 5 is not enough to enable the rope wheel shaft to rotate at a constant speed, but the speed is reduced and reduced due to the inertia of the weight block 7, the rotation radius is reduced, the total rotation speed ratio is increased, the trolley is slowly reduced until the trolley stops, and the weight block 7 stops falling and just contacts the bottom plate 10.

Preferably, in the above device, the restoring member 22 is a rubber band or a spring. As can be understood by those skilled in the art, in order to facilitate the resetting of the thrust rod 12 and reduce the manufacturing cost, the resetting element 22 of the device is preferably a rubber band or a spring, and specifically, one end of the resetting element 22 is connected to the thrust rod 12, and the other end is connected to the supporting bearing seat of the rope pulley shaft 4. In practice, it is further preferable that the restoring member 22 is a rubber band, and the contact force between the thrust rod 12 and the cam 17 can be adjusted by increasing or decreasing the number of the rubber bands, so that one end of the thrust rod 12 is always in contact connection with the outer side wall of the cam 7.

Preferably, the device further comprises a shift lever 13, wherein the shift lever 13 is arranged perpendicular to the bottom plate 10, the upper end of the shift lever 13 is connected with the thrust rod 12, and the lower end of the shift lever is inserted into the strip-shaped hole of the sliding block 14. It will be appreciated by those skilled in the art that, in order to facilitate the connection of the thrust rod 12 to the slide 14, the device preferably further comprises a shift rod 13, and the shift rod 13 is disposed substantially perpendicular to the base plate 10, such that the shift rod 13 is disposed perpendicular to the slide 14, i.e., the shift rod 13 vertically penetrates through the bar-shaped hole of the slide 14. Meanwhile, the upper end of the deflector rod 13 is connected with the thrust rod 12, and the lower end is inserted into the strip-shaped hole of the slide block 14. Particularly, a bearing is preferably arranged on the side wall of the strip-shaped hole, through which the shifting rod 13 extends into the sliding block 14, so that the inner ring of the bearing is fixed with the shifting rod 13, the outer ring of the bearing is directly connected with the inner wall of the strip-shaped hole in a rotating manner and cannot move along the length direction of the strip-shaped hole, the shifting rod 13 and the sliding block 14 are connected in a rolling manner instead of a sliding connection manner through the structural arrangement, and friction energy consumption is further reduced. The bearing can be preferred to set up in the middle part in bar hole simultaneously, and when slider 14 rotated and keep the bearing to be located the middle part in bar hole all the time for it is more accurate to lead 2 steering of front wheel.

Preferably, still include adjusting frame 15 and adjusting screw 19 among the above-mentioned device, adjusting frame 15 lateral wall and 12 end connection of thrust rod and be provided with the bar hole on adjusting frame 15, all be provided with the screw hole on the both ends lateral wall in bar hole and the driving lever 13, driving lever 13 card is gone into in the bar hole on adjusting frame 15, and adjusting screw 19's one end penetrates from the screw hole of bar hole one end to wear out from the opposite side in bar hole again after passing driving lever 13. As will be appreciated by those skilled in the art, since the crank mechanism is sensitive to machining and assembly errors, a fine adjustment mechanism must be added to correct the errors. Meanwhile, in order to adjust the track (amplitude, period, direction and the like) of the carbon-free trolley, only in this way can the trolley walk out of an optimal track during running. Just because of the reason, the device is preferably added with a fine adjustment device, the fine adjustment device of the device comprises an adjustment frame 15 and an adjustment screw rod 19, particularly, the side wall of the adjustment frame 15 is connected with the end part of the thrust rod 12, the adjustment frame 15 is kept to be vertically arranged with the thrust rod 12, a strip-shaped hole is arranged on the adjustment frame 15, meanwhile, threaded holes are respectively arranged on the side walls at the two ends of the strip-shaped hole (namely the end part of the adjusting frame 15 in the length direction) and the deflector rod 13, the deflector rod 13 is clamped into the strip-shaped hole on the adjusting frame 15, one end of an adjusting screw rod 19 penetrates through the threaded hole at one end of the strip-shaped hole, the shifting rod 13 penetrates through the other side of the strip-shaped hole after penetrating through the shifting rod 13, the shifting rod 13 can move along the length direction of the strip-shaped hole in the adjusting frame 15 by screwing the adjusting screw rod 19 through the structure, the purpose of adjusting the rotation speed of the guide front wheel 2 is achieved, and the trolley is prevented from toppling over due to sharp steering.

Preferably, the device further comprises a guide post 11, the guide post 11 is vertically arranged on the bottom plate 10, a through hole is arranged at the upper part of the guide post 11, and the thrust rod 12 is sleeved on the guide post 11 in a penetrating manner. As will be understood by those skilled in the art, in order to ensure that the thrust rod 12 always moves left and right, the present device preferably provides a guide post 11 on the bottom plate 10, so that the thrust rod 12 passes through a through hole at the upper part of the guide post 11, thereby ensuring that the thrust rod 12 moves along the axis of the through hole, i.e., the above-mentioned left and right movement. While it may be further preferred to provide linear bearings within the through-hole to further define the direction of movement of the thrust rod 12.

Preferably, in the above device, one end of the rope wheel shaft 4 is provided with a driving gear 3, a driven gear 18 is arranged on the rotating shaft of the rear wheel 1 on one side of the bottom plate 10, and the driving gear 3 is meshed with the driven gear 18. As can be understood by those skilled in the art, in order to facilitate the rotation of the rope pulley shaft 4 to drive the rear wheel 1 to rotate so as to realize the trolley movement, the device is preferably provided with a driving gear 3 at one end of the rope pulley shaft 4, so that the driving gear 3 and the rope pulley shaft 4 rotate synchronously, and a driven gear 18 is arranged on the rotating shaft of the rear wheel 1 at one side of the bottom plate 10, so that the driven gear 18 and the rear wheel 1 at one side rotate synchronously, and the driving gear 3 is engaged with the driven gear 18, so that the purpose that the heavy object 7 falls to drive the rope pulley shaft 4 to rotate so as to realize the trolley movement can be realized. Meanwhile, in order to make the trolley move forward far, theoretically, the larger the diameter of the rear wheel 1 is, the better the diameter is, but the larger the rear wheel 1 is, the larger the torque required during starting is, and the larger the small-size cold quantity is. According to the selection principle of the transmission ratio, the requirements of the trolley on accuracy of the transmission ratio, processing manufacturability, comprehensive track length and wheel size during running are considered. Preliminarily determining the gear transmission ratio as 1: 4, the large gear number is 64, and the small gear number is 16. In order to reduce the weight of the trolley and facilitate positioning, the driving gear 3 and the driven gear 18 are designed to be provided with bosses, and threaded holes are formed in the bosses for fixing. The small module gear is selected, so that the resistance of the trolley in the advancing process can be effectively reduced, and the manufacturing difficulty, the processing cost and the service life of the gear can be increased due to the small module. Therefore, the module of the driving gear 3 and the driven gear 18 is preferably determined to be 1. And the boss set screw is matched with the shaft, so that the axial and radial positioning of the gear can be ensured.

Preferably, in the above device, the support 8 is a T-shaped structure, the small end of the support is vertically connected with the bottom plate 10, the large end of the support is provided with a pulley 9, and the rope 5 is connected with the weight block 7 after passing through the pulley 9. It will be appreciated by those skilled in the art that in order to reduce energy losses, the sliding connection is replaced by providing a pulley 9 at the upper end of the bracket 8 and winding the rope 5 around the pulley 9. In order to adjust the force angle of the rope 5, the bracket 8 is preferably in a T-shaped structure, and pulleys 9 are arranged at the two ends of the large end of the bracket 8. The weight block 7 which is actually used for providing energy is hung on a bracket 8 with the effective height of 400 +/-2 mm through a pulley 9 to be freely dropped, thereby providing energy for the advancing of the trolley. Meanwhile, on the premise of ensuring that the length of the car body is fixed, the radius of the fixed pulley 9 is as large as possible. In order to ensure that the weight block 7 keeps constant speed in the falling process, when the nylon wire is wound on the pulley 9, the nylon wire is wound on the pulley 9 for a plurality of circles, so that the falling speed of the weight can be effectively reduced, and the utilization rate of energy is improved.

Preferably, the device further comprises a limiting frame 6, the limiting frame 6 is of a tubular structure and is vertically arranged on the bottom plate 10, and the heavy object block 7 is arranged in the limiting frame 6. As can be understood by those skilled in the art, in order to avoid the situation that when a heavy object falls, the heavy object swings due to the walking of the trolley, the traveling track of the trolley is influenced, and even the trolley is overturned, the limiting frame 6 is preferably additionally arranged on the bottom plate 10 to prevent the heavy object block 7 from swinging, the limiting frame 6 is of a tubular structure, and can be preferably of a hollow circular tube structure, 3 vertical rods can be practically enclosed, the 3 vertical rods are fixed through a ferrule, and the side wall of the rod is ensured to be tangent to the circumference of the falling heavy object block 7 to form a hollow cylindrical shape.

Preferably, in the above device, there are at least two thrust rods 12, and push rods 20 are connected to adjacent thrust rods 12 near the cam 17 end, and at least one push rod 20 is connected in contact with the outer wall of the cam 17 through a reset member 22. As will be appreciated by those skilled in the art, in order to facilitate good contact between the thrust rods 12 and the cam 17, the device preferably has at least two thrust rods 12, and push rods 20 are connected to adjacent thrust rods 12 near the end of the cam 17, and at least one push rod 20 is connected to the outer wall of the cam 17 through a return member 22, so that the side wall of the cam 17 is directly contacted with the push rod 20 to prevent slipping. Meanwhile, the outside of the push rod 20 can be preferably sleeved with a roller or a sleeve, so that energy loss is reduced.

Claims (10)

1. Two 8 word tracks carbon-free dolly, its characterized in that: the device comprises a bottom plate (10), rear wheels (1), guide front wheels (2), a support (8), two rope wheel shafts (4), ropes (5), a thrust rod (12), a cam (17), a reset piece (22) and a heavy object block (7), wherein the two rear wheels (1) are arranged on two sides of one end part of the bottom plate (10) and are rotatably connected with the bottom plate (10), an installation part (21) of each guide front wheel (2) vertically penetrates through the other end of the bottom plate (10) and is rotatably connected with the bottom plate (10), and a sliding block (14) with a strip-shaped hole is arranged on the end face, penetrating through the bottom plate (10), of the installation part (21); rope sheave axle (4) erect on bottom plate (10), and rotate rope sheave axle (4) and can drive one side rear wheel (1) rotatory, the vertical setting of support (8) is on bottom plate (10), the one end winding of rope (5) is on rope sheave axle (4), the other end is walked around support (8) upper end and is connected with heavy thing piece (7) again, cam (17) cover is established on rope sheave axle (4), thrust rod (12) make its one end be connected with cam (17) lateral wall contact through reset piece (22), the other end penetrates in the bar hole of slider (14).

2. The double 8-track carbonless cart of claim 1, wherein: the middle part of the rope wheel shaft (4) is of a conical structure, and the end part of the rope (5) is wound on the conical structure.

3. The double 8-track carbonless cart of claim 1, wherein: the reset piece (22) is a rubber band or a spring.

4. The double 8-track carbonless cart of claim 1, wherein: the lifting rod (13) is perpendicular to the bottom plate (10), the upper end of the lifting rod is connected with the thrust rod (12), and the lower end of the lifting rod is inserted into the strip-shaped hole of the sliding block (14).

5. The double 8-track carbonless cart of claim 4, wherein: still including adjusting frame (15) and adjusting screw (19), be provided with the bar hole on adjusting frame (15) lateral wall and thrust rod (12) end connection and adjusting frame (15), all be provided with the screw hole on the both ends lateral wall in bar hole and driving lever (13), driving lever (13) card is gone into the bar hole on adjusting frame (15), and the screw hole of one end from bar hole one end of adjusting screw (19) penetrates to wear out from the opposite side in bar hole again after passing driving lever (13).

6. The double 8-track carbonless cart of claim 1, wherein: the device is characterized by further comprising a guide post (11), wherein the guide post (11) is vertically arranged on the bottom plate (10), a through hole is formed in the upper portion of the guide post, and the thrust rod (12) penetrates through the guide post (11).

7. The double 8-track carbonless cart of claim 1, wherein: one end of the rope wheel shaft (4) is provided with a driving gear (3), a driven gear (18) is arranged on the rotating shaft of the rear wheel (1) on one side of the bottom plate (10), and the driving gear (3) is meshed with the driven gear (18).

8. The double 8-track carbonless cart of claim 1, wherein: the support (8) is of a T-shaped structure, the small end of the support is vertically connected with the bottom plate (10), the large end of the support is provided with a pulley (9), and the rope (5) is connected with the heavy object block (7) after bypassing the pulley (9).

9. The double 8-track carbonless cart of claim 1, wherein: the heavy object storage rack is characterized by further comprising a limiting frame (6), wherein the limiting frame (6) is of a tubular structure and is vertically arranged on the bottom plate (10), and the heavy object block (7) is arranged in the limiting frame (6).

10. The double 8-track carbonless cart of claim 1, wherein: the number of the thrust rods (12) is at least two, push rods (20) are connected to the ends, close to the cam (17), of the adjacent thrust rods (12), and at least one push rod (20) is in contact connection with the outer wall of the cam (17) through a reset piece (22).

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